 @media all and (max-width: 400px) {
.btn{
	color: white;
	text-decoration: none;	
}
.wen{
	position: relative;
	top: 0px;
	left: 300px;
	color: white;
	text-decoration: none;	
}
.f1{
	position: absolute;
	top: 553px;
	left: 20px;
	width: 100%;
	height: 100px;
	background:rgba(66,64,58,0.9);
	visibility:hidden;  /**可见：设为隐藏**/
}
.f1:target {   /**目标**/
	visibility: visible;   /**可见：设为显示**/
	opacity: 1;
	pointer-events: auto;
}
.hezi{
	width: 80px;
	height:80px;
	border: 0px solid #0000FF;
	position: absolute;
	top: 10px;
	left: 10px;
}
.hezi img{
	width: 100%;
	height: 100%;
	border-radius: 50%;
	border: 2px solid aqua;
	box-shadow: 0px 0px 10px aqua;  /*边框阴影*/
	animation:hezi 15s infinite;
	
}
@keyframes hezi{
    from{
		transform:rotate(0deg);
		border: 2px solid aqua;
    }
    to{
		transform:rotate(360deg);
		border: 2px solid greenyellow;
    }
}

.font{
	margin-top:0px ;
	margin-left: 100px;
	font-size: 5px;
	color: white;
}
audio{
	width:200px ;
	height:20px;
	overflow: hidden;
	margin-left:100px ;
	margin-top:10px ;
}
}